[jira] [Updated] (NIFI-3149) Expression Language should support passing negative numbers as literals

["Joseph Percivall (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-3149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph Percivall updated NIFI-3149:
-----------------------------------
    Status: Patch Available  (was: Open)

> Expression Language should support passing negative numbers as literals
> -----------------------------------------------------------------------
>
>                 Key: NIFI-3149
>                 URL: https://issues.apache.org/jira/browse/NIFI-3149
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Joseph Percivall
>            Assignee: Joseph Percivall
>            Priority: Trivial
>
> Currently using "${literal(-5.5):toNumber()" will result in an anltr parsing exception due to '-' not being handled in the Lexer[1]. 
> In the ANTLR lexer, "+" and "-" should be added a potential values at the beginning of a WHOLE_NUMBER  or DECIMAL.
> A workaround is to place the number in quotes: ${literal("-5.5"):toNumber()
> [1] https://github.com/apache/nifi/blob/master/nifi-commons/nifi-expression-language/src/main/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionLexer.g#L80-L80



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